Thanks Gregg,
I wonder who else may chime in?
I have to make a trip into “the big smoke “ (Vancouver) tomorrow to look over a tree job and will be taking the Impact along to try my luck in a few older parks with the 7” concentric and the stock 11” coils. I resisted the urge to jump from the Impact to the Anfibio when it was released even though the volatile memory is a pain. I am going to put in some more time walking along behind that Impact and see what comes of it

. May try the newer 11” coil on it for open areas.
Jury still out on a CORE unit but your vote certainly carries some weight with me.
Cheers,
Drew.